Symptom guide
Car Starts Then Dies
How to narrow down a car that fires briefly and then stalls.
Quick answer
Starting then dying can come from fuel delivery, air metering, immobilizer, idle control, or a large vacuum leak.
Most likely causes
- Weak fuel pump
- Dirty throttle body
- MAF sensor problem
- Immobilizer issue
- Stuck-open purge valve
Basic driver checks
- Notice whether the security light stays on.
- Check for codes before clearing anything.
- Listen for fuel pump prime.
- See if it starts better with light throttle.
DIY diagnostic path
- Inspect intake hoses for disconnection.
- Check the air filter box after recent service.
- Scan for MAF, lean, or idle codes.
- Avoid repeated starts that flood the engine.
Common mistakes
- Assuming the starter is bad
- Clearing immobilizer clues
- Replacing the fuel pump before basic checks
What to tell the mechanic
Tell the shop how long it runs before dying and whether throttle input changes it.